Active For Sale • Single Family Residence

$10,750,000

$1,344 per sq ft

34 W 21ST Street

Flatiron, Manhattan

MLS® #RLS20059098

Listing by Douglas Elliman Real Estate

5

Bedrooms

7.5

Baths

8,000

Sq. Ft.

—

Year Built

Quick Summary

Bedrooms 5

Bathrooms 7 full, 3 half

Living Area 8,000 sq ft

Lot Size 1,472 sq ft

Year Built N/A

Ownership None

Property Taxes $118,548/yr

Parking Garage (1)

Neighborhood Flatiron

Floor 1 of 7

Property Highlights

• Views: Other
• Outdoor Space: Terrace
• Fireplace: 1 fireplace

Property Details

Type Single Family Residence

Ownership None

Total Rooms 12

Baths 6 Full, 3 Half

Floor 1 of 7

View Other

Cooling Central Air

Pets Yes

Living Area 8,000 sq ft

Parking Garage Available (1 spaces)

Parking Features Assigned, Garage

Structure Type Townhouse

Basement Other

Lot Size 1,472 sq ft

Parcel # 0822-0059

Block/Lot 01824/0016

Description

NEWLY CONSTRUCTED 7 STORY STEEL & CONCRETE BUILDING WITH ELEVATOR AND GARAGE IN FLATIRON

Introducing a Vanderploeg Team Exclusive at Douglas Elliman:

34 West 21st Street presents a rare opportunity to own a newly constructed 8,000 square foot turn-key 5 bedroom/5 bath one unit home, boutique office building or private members club in the heart of New York City. Designed by acclaimed architect Karl Fischer and interior designer Andres Escobar, this 7-story building represents a masterclass in modern architecture. Oversized windows, high-end finishes and soaring ceiling heights (including almost 16' on the parlor floor and 28' in the double height chef's kitchen) give the property a modern and open feel throughout. The private garage and commercial grade glass elevator provide easy access to and throughout the building. The large garden, roof terrace, and sauna provide a tranquil retreat in one of the liveliest neighborhoods in Manhattan. The C5-6 / R10A zoning is one of the most flexible in the city and permits nearly all commercial and residential uses.

The Flatiron district offers the best of New York City including world class dining, art institutions and historic architecture. Notable venues just moments away include 11 Madison Park, Eataly, and Madison Square Park. Reach out to us via email or phone to schedule an appointment.

Features & Amenities

Interior Features

Smoke Free Building Other Washer Hookup In Unit Fireplace (1)

Exterior Features

Private Outdoor Space Over60 Sqft Terrace

Building Amenities

Elevators Green Building

Appliances

Washer Dryer Allowed

Building Information

Total Units 1

Stories 7

Structure Townhouse

Financial Details

RE Taxes $118,548/yr ($9,879/mo)

About Flatiron

View All Flatiron Listings

The Flatiron District is a vibrant intersection of history, technology, and luxury living. Named after the iconic Flatiron Building, the neighborhood is centered around Madison Square Park and is a hub for the city's 'Silicon Alley.' The real estate market is famous for its grand cast-iron loft buildings with high ceilings and expansive floor plans, alongside ultra-luxury glass towers that offer modern amenities and central Manhattan convenience.

Flatiron Live Market Data

View Neighborhood

Active Listings

113

Median Asking Price

$2.50M

Median $/Sqft

$1,793

Avg Days on Market

N/A

New This Week

9

Price Reduced

27%

Sold (30 Days)

3

Median Sale Price

$3.15M

Live data from RLS at REBNY • Updated 3/9/26, 4:16 PM EST

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Location

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34 W 21ST Street, Flatiron, New York County

NYC Zoning • Google Maps • Street View

Data Sources & Methodology

Listing Data

RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.

Market Data

RLS® at REBNY (Real Estate Board of New York). Live data updated in real-time.

Map & Location

OpenStreetMap contributors via Leaflet. Geocoding via Nominatim.

All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.

MLS® ID: RLS20059098

First Listed: 11/10/2025

On Market: 11/10/2025

Price Changed: 11/10/2025

Contract Date: 11/10/2025

Listing Courtesy of Douglas Elliman Real Estate - George W Vanderploeg

Listing Contact: (917) 301-0158

Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer's personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., all rights reserved. This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

RLS Data display by Keller Williams NYC. Data last updated on 3/9/2026 at 8:16 PM UTC